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<?php
/*
Plugin Name: Easy WP SMTP
Version: 1.3.9.1
Plugin URI: https://wp-ecommerce.net/easy-wordpress-smtp-send-emails-from-your-wordpress-site-using-a-smtp-server-2197
Author: wpecommerce, alexanderfoxc
Author URI: https://wp-ecommerce.net/
Description: Send email via SMTP from your WordPress Blog
Text Domain: easy-wp-smtp
Domain Path: /languages
*/
//Prefix/Slug - swpsmtp
class EasyWPSMTP {
var $opts;
var $plugin_file;
protected static $instance = null;
function __construct() {
$this->opts = get_option( 'swpsmtp_options' );
$this->opts = ! is_array( $this->opts ) ? array() : $this->opts;
$this->plugin_file = __FILE__;
require_once('easy-wp-smtp-utils.php');
add_action( 'plugins_loaded', array( $this, 'plugins_loaded_handler' ) );
add_filter( 'wp_mail', array( $this, 'wp_mail' ), 2147483647 );
add_action( 'phpmailer_init', array( $this, 'init_smtp' ), 999 );
add_action( 'admin_init', array( $this, 'admin_init' ) );
if ( is_admin() && ! (defined( 'DOING_AJAX' ) && DOING_AJAX) ) {
require_once('easy-wp-smtp-admin-menu.php');
register_activation_hook( __FILE__, array( $this, 'activate' ) );
register_uninstall_hook( __FILE__, 'swpsmtp_uninstall' );
add_filter( 'plugin_action_links', array( $this, 'plugin_action_links' ), 10, 2 );
add_filter( 'plugin_row_meta', array( $this, 'register_plugin_links' ), 10, 2 );
add_action( 'admin_notices', array( $this, 'admin_notices' ) );
}
}
public static function get_instance() {
if ( null == self::$instance ) {
self::$instance = new self;
}
return self::$instance;
}
function wp_mail( $args ) {
$domain = $this->is_domain_blocked();
if ( $domain !== false && (isset( $this->opts[ 'block_all_emails' ] ) && $this->opts[ 'block_all_emails' ] === 1) ) {
$this->log(
"\r\n------------------------------------------------------------------------------------------------------\r\n" .
"Domain check failed: website domain (" . $domain . ") is not in allowed domains list.\r\n" .
"Following email not sent (block all emails option is enabled):\r\n" .
"To: " . $args[ 'to' ] . "; Subject: " . $args[ 'subject' ] . "\r\n" .
"------------------------------------------------------------------------------------------------------\r\n\r\n" );
}
return $args;
}
function init_smtp( &$phpmailer ) {
//check if SMTP credentials have been configured.
if ( ! $this->credentials_configured() ) {
return;
}
//check if Domain Check enabled
$domain = $this->is_domain_blocked();
if ( $domain !== false ) {
//domain check failed
//let's check if we have block all emails option enabled
if ( isset( $this->opts[ 'block_all_emails' ] ) && $this->opts[ 'block_all_emails' ] === 1 ) {
// it's enabled. Let's use gag mailer class that would prevent emails from being sent out.
$phpmailer = new swpsmtp_gag_mailer();
} else {
// it's disabled. Let's write some info to the log
$this->log(
"\r\n------------------------------------------------------------------------------------------------------\r\n" .
"Domain check failed: website domain (" . $domain . ") is not in allowed domains list.\r\n" .
"SMTP settings won't be used.\r\n" .
"------------------------------------------------------------------------------------------------------\r\n\r\n" );
}
return;
}
/* Set the mailer type as per config above, this overrides the already called isMail method */
$phpmailer->IsSMTP();
if ( isset( $this->opts[ 'force_from_name_replace' ] ) && $this->opts[ 'force_from_name_replace' ] === 1 ) {
$from_name = $this->opts[ 'from_name_field' ];
} else {
$from_name = ! empty( $phpmailer->FromName ) ? $phpmailer->FromName : $this->opts[ 'from_name_field' ];
}
$from_email = $this->opts[ 'from_email_field' ];
//set ReplyTo option if needed
//this should be set before SetFrom, otherwise might be ignored
if ( ! empty( $this->opts[ 'reply_to_email' ] ) ) {
$phpmailer->AddReplyTo( $this->opts[ 'reply_to_email' ], $from_name );
}
// let's see if we have email ignore list populated
if ( isset( $this->opts[ 'email_ignore_list' ] ) && ! empty( $this->opts[ 'email_ignore_list' ] ) ) {
$emails_arr = explode( ',', $this->opts[ 'email_ignore_list' ] );
if ( is_array( $emails_arr ) && ! empty( $emails_arr ) ) {
//we have coma-separated list
} else {
//it's single email
unset( $emails_arr );
$emails_arr = array( $this->opts[ 'email_ignore_list' ] );
}
$from = $phpmailer->From;
$match_found = false;
foreach ( $emails_arr as $email ) {
if ( strtolower( trim( $email ) ) === strtolower( trim( $from ) ) ) {
$match_found = true;
break;
}
}
if ( $match_found ) {
//we should not override From and Fromname
$from_email = $phpmailer->From;
$from_name = $phpmailer->FromName;
}
}
$phpmailer->From = $from_email;
$phpmailer->FromName = $from_name;
$phpmailer->SetFrom( $phpmailer->From, $phpmailer->FromName );
//This should set Return-Path header for servers that are not properly handling it, but needs testing first
//$phpmailer->Sender = $phpmailer->From;
/* Set the SMTPSecure value */
if ( $this->opts[ 'smtp_settings' ][ 'type_encryption' ] !== 'none' ) {
$phpmailer->SMTPSecure = $this->opts[ 'smtp_settings' ][ 'type_encryption' ];
}
/* Set the other options */
$phpmailer->Host = $this->opts[ 'smtp_settings' ][ 'host' ];
$phpmailer->Port = $this->opts[ 'smtp_settings' ][ 'port' ];
/* If we're using smtp auth, set the username & password */
if ( 'yes' == $this->opts[ 'smtp_settings' ][ 'autentication' ] ) {
$phpmailer->SMTPAuth = true;
$phpmailer->Username = $this->opts[ 'smtp_settings' ][ 'username' ];
$phpmailer->Password = $this->get_password();
}
//PHPMailer 5.2.10 introduced this option. However, this might cause issues if the server is advertising TLS with an invalid certificate.
$phpmailer->SMTPAutoTLS = false;
if ( isset( $this->opts[ 'smtp_settings' ][ 'insecure_ssl' ] ) && $this->opts[ 'smtp_settings' ][ 'insecure_ssl' ] !== false ) {
// Insecure SSL option enabled
$phpmailer->SMTPOptions = array(
'ssl' => array(
'verify_peer' => false,
'verify_peer_name' => false,
'allow_self_signed' => true
) );
}
if ( isset( $this->opts[ 'smtp_settings' ][ 'enable_debug' ] ) && $this->opts[ 'smtp_settings' ][ 'enable_debug' ] ) {
$phpmailer->Debugoutput = function($str, $level) {
$this->log( $str );
};
$phpmailer->SMTPDebug = 1;
}
//set reasonable timeout
$phpmailer->Timeout = 10;
}
function test_mail( $to_email, $subject, $message ) {
$ret = array();
if ( ! $this->credentials_configured() ) {
return false;
}
require_once( ABSPATH . WPINC . '/class-phpmailer.php' );
$mail = new PHPMailer( true );
try {
$charset = get_bloginfo( 'charset' );
$mail->CharSet = $charset;
$from_name = $this->opts[ 'from_name_field' ];
$from_email = $this->opts[ 'from_email_field' ];
$mail->IsSMTP();
// send plain text test email
$mail->ContentType = 'text/plain';
$mail->IsHTML( false );
/* If using smtp auth, set the username & password */
if ( 'yes' == $this->opts[ 'smtp_settings' ][ 'autentication' ] ) {
$mail->SMTPAuth = true;
$mail->Username = $this->opts[ 'smtp_settings' ][ 'username' ];
$mail->Password = $this->get_password();
}
/* Set the SMTPSecure value, if set to none, leave this blank */
if ( $this->opts[ 'smtp_settings' ][ 'type_encryption' ] !== 'none' ) {
$mail->SMTPSecure = $this->opts[ 'smtp_settings' ][ 'type_encryption' ];
}
/* PHPMailer 5.2.10 introduced this option. However, this might cause issues if the server is advertising TLS with an invalid certificate. */
$mail->SMTPAutoTLS = false;
if ( isset( $this->opts[ 'smtp_settings' ][ 'insecure_ssl' ] ) && $this->opts[ 'smtp_settings' ][ 'insecure_ssl' ] !== false ) {
// Insecure SSL option enabled
$mail->SMTPOptions = array(
'ssl' => array(
'verify_peer' => false,
'verify_peer_name' => false,
'allow_self_signed' => true
) );
}
/* Set the other options */
$mail->Host = $this->opts[ 'smtp_settings' ][ 'host' ];
$mail->Port = $this->opts[ 'smtp_settings' ][ 'port' ];
if ( ! empty( $this->opts[ 'reply_to_email' ] ) ) {
$mail->AddReplyTo( $this->opts[ 'reply_to_email' ], $from_name );
}
$mail->SetFrom( $from_email, $from_name );
//This should set Return-Path header for servers that are not properly handling it, but needs testing first
//$mail->Sender = $mail->From;
$mail->Subject = $subject;
$mail->Body = $message;
$mail->AddAddress( $to_email );
global $debugMSG;
$debugMSG = '';
$mail->Debugoutput = function($str, $level) {
global $debugMSG;
$debugMSG .= $str;
};
$mail->SMTPDebug = 1;
//set reasonable timeout
$mail->Timeout = 10;
/* Send mail and return result */
$mail->Send();
$mail->ClearAddresses();
$mail->ClearAllRecipients();
} catch ( Exception $e ) {
$ret[ 'error' ] = $mail->ErrorInfo;
}
$ret[ 'debug_log' ] = $debugMSG;
return $ret;
}
function admin_init() {
if ( current_user_can( 'manage_options' ) ) {
if ( defined( 'DOING_AJAX' ) && DOING_AJAX ) {
add_action( 'wp_ajax_swpsmtp_clear_log', array( $this, 'clear_log' ) );
add_action( 'wp_ajax_swpsmtp_self_destruct', array( $this, 'self_destruct_handler' ) );
}
//view log file
if ( isset( $_GET[ 'swpsmtp_action' ] ) ) {
if ( $_GET[ 'swpsmtp_action' ] === 'view_log' ) {
$log_file_name = $this->opts[ 'smtp_settings' ][ 'log_file_name' ];
if ( ! file_exists( plugin_dir_path( __FILE__ ) . $log_file_name ) ) {
if ( $this->log( "Easy WP SMTP debug log file\r\n\r\n" ) === false ) {
wp_die( 'Can\'t write to log file. Check if plugin directory (' . plugin_dir_path( __FILE__ ) . ') is writeable.' );
};
}
$logfile = fopen( plugin_dir_path( __FILE__ ) . $log_file_name, 'rb' );
if ( ! $logfile ) {
wp_die( 'Can\'t open log file.' );
}
header( 'Content-Type: text/plain' );
fpassthru( $logfile );
die;
}
}
//check if this is export settings request
$is_export_settings = filter_input( INPUT_POST, 'swpsmtp_export_settings', FILTER_SANITIZE_NUMBER_INT );
if ( $is_export_settings ) {
$data = array();
$opts = get_option( 'swpsmtp_options', array() );
$data[ 'swpsmtp_options' ] = $opts;
$swpsmtp_pass_encrypted = get_option( 'swpsmtp_pass_encrypted', false );
$data[ 'swpsmtp_pass_encrypted' ] = $swpsmtp_pass_encrypted;
if ( $swpsmtp_pass_encrypted ) {
$swpsmtp_enc_key = get_option( 'swpsmtp_enc_key', false );
$data[ 'swpsmtp_enc_key' ] = $swpsmtp_enc_key;
}
$smtp_test_mail = get_option( 'smtp_test_mail', array() );
$data[ 'smtp_test_mail' ] = $smtp_test_mail;
$out = array();
$out[ 'data' ] = serialize( $data );
$out[ 'ver' ] = 1;
$out[ 'checksum' ] = md5( $out[ 'data' ] );
$filename = 'easy_wp_smtp_settings.txt';
header( 'Content-Disposition: attachment; filename="' . $filename . '"' );
header( 'Content-Type: text/plain' );
echo serialize( $out );
exit;
}
$is_import_settings = filter_input( INPUT_POST, 'swpsmtp_import_settings', FILTER_SANITIZE_NUMBER_INT );
if ( $is_import_settings ) {
$err_msg = __( 'Error occurred during settings import', 'easy-wp-smtp' );
if ( empty( $_FILES[ 'swpsmtp_import_settings_file' ] ) ) {
echo $err_msg;
wp_die();
}
$in_raw = file_get_contents( $_FILES[ 'swpsmtp_import_settings_file' ][ 'tmp_name' ] );
try {
$in = unserialize( $in_raw );
if ( empty( $in[ 'data' ] ) ) {
echo $err_msg;
wp_die();
}
if ( empty( $in[ 'checksum' ] ) ) {
echo $err_msg;
wp_die();
}
if ( md5( $in[ 'data' ] ) !== $in[ 'checksum' ] ) {
echo $err_msg;
wp_die();
}
$data = unserialize( $in[ 'data' ] );
update_option( 'swpsmtp_options', $data[ 'swpsmtp_options' ] );
update_option( 'swpsmtp_pass_encrypted', $data[ 'swpsmtp_pass_encrypted' ] );
if ( $data[ 'swpsmtp_pass_encrypted' ] ) {
update_option( 'swpsmtp_enc_key', $data[ 'swpsmtp_enc_key' ] );
}
update_option( 'smtp_test_mail', $data[ 'smtp_test_mail' ] );
set_transient( 'easy_wp_smtp_settings_import_success', true, 60 * 60 );
$url = admin_url() . 'options-general.php?page=swpsmtp_settings';
wp_safe_redirect( $url );
exit;
} catch ( Exception $ex ) {
echo $err_msg;
wp_die();
}
}
}
}
function admin_notices() {
if ( ! $this->credentials_configured() ) {
$settings_url = admin_url() . 'options-general.php?page=swpsmtp_settings';
?>
<div class="error">
<p><?php printf( __( 'Please configure your SMTP credentials in the <a href="%s">settings menu</a> in order to send email using Easy WP SMTP plugin.', 'easy-wp-smtp' ), esc_url( $settings_url ) ); ?></p>
</div>
<?php
}
$settings_import_notice = get_transient( 'easy_wp_smtp_settings_import_success' );
if ( $settings_import_notice ) {
delete_transient( 'easy_wp_smtp_settings_import_success' );
?>
<div class="updated">
<p><?php _e( 'Settings have been imported successfully.', 'easy-wp-smtp' ); ?></p>
</div>
<?php
}
}
function clear_log() {
if ( $this->log( "Easy WP SMTP debug log file\r\n\r\n", true ) !== false ) {
echo '1';
} else {
echo 'Can\'t clear log - log file is not writeable.';
}
die;
}
function log( $str, $overwrite = false ) {
if ( isset( $this->opts[ 'smtp_settings' ] [ 'log_file_name' ]
) ) {
$log_file_name = $this->
opts[ 'smtp_settings' ][ 'log_file_name' ];
} else {
// let's generate log file name
$log_file_name = uniqid() . '_debug_log.txt';
$this->opts[ 'smtp_settings' ][ 'log_file_name' ] = $log_file_name;
update_option( 'swpsmtp_options', $this->opts );
file_put_contents( plugin_dir_path( __FILE__ ) . $log_file_name, "Easy WP SMTP debug log file\r\n\r\n" );
}
return(file_put_contents( plugin_dir_path( __FILE__ ) . $log_file_name, $str, ( ! $overwrite ? FILE_APPEND : 0 ) ));
}
function plugin_action_links( $links, $file ) {
if ( $file == plugin_basename( $this->plugin_file ) ) {
$settings_link = '<a href="options-general.php?page=swpsmtp_settings">' . __( 'Settings', 'easy-wp-smtp' ) . '</a>';
array_unshift( $links, $settings_link );
}
return $links;
}
function register_plugin_links( $links, $file ) {
if ( $file == plugin_basename( $this->plugin_file ) ) {
$links[] = '<a href="options-general.php?page=swpsmtp_settings">' . __( 'Settings', 'easy-wp-smtp' ) . '</a>';
}
return $links;
}
function plugins_loaded_handler() {
load_plugin_textdomain( 'easy-wp-smtp', false, dirname( plugin_basename( $this->plugin_file ) ) . '/languages/' );
}
function is_domain_blocked() {
//check if Domain Check enabled
if ( isset( $this->opts[ 'enable_domain_check' ] ) && $this->opts[ 'enable_domain_check' ] ) {
//check if allowed domains list is not blank
if ( isset( $this->opts[ 'allowed_domains' ] ) && ! empty( $this->opts[ 'allowed_domains' ] ) ) {
$this->opts[ 'allowed_domains' ] = SWPSMTPUtils::base64_decode_maybe( $this->opts[ 'allowed_domains' ] );
//let's see if we have one domain or coma-separated domains
$domains_arr = explode( ',', $this->opts[ 'allowed_domains' ] );
if ( is_array( $domains_arr ) && ! empty( $domains_arr ) ) {
//we have coma-separated list
} else {
//it's single domain
unset( $domains_arr );
$domains_arr = array( $this->opts[ 'allowed_domains' ] );
}
$site_domain = parse_url( get_site_url(), PHP_URL_HOST );
$match_found = false;
foreach ( $domains_arr as $domain ) {
if ( strtolower( trim( $domain ) ) === strtolower( trim( $site_domain ) ) ) {
$match_found = true;
break;
}
}
if ( ! $match_found ) {
return $site_domain;
}
}
}
return false;
}
function get_password() {
$temp_password = isset( $this->opts[ 'smtp_settings' ][ 'password' ] ) ? $this->opts[ 'smtp_settings' ][ 'password' ] : '';
if ( $temp_password == '' ) {
return '';
}
try {
if ( get_option( 'swpsmtp_pass_encrypted' ) ) {
//this is encrypted password
$cryptor = SWPSMTPUtils::get_instance();
$decrypted = $cryptor->decrypt_password( $temp_password );
//check if encryption option is disabled
if ( empty( $this->opts[ 'smtp_settings' ][ 'encrypt_pass' ] ) ) {
//it is. let's save decrypted password
$this->opts[ 'smtp_settings' ][ 'password' ] = $this->encrypt_password( addslashes( $decrypted ) );
update_option( 'swpsmtp_options', $this->opts );
}
return $decrypted;
}
} catch ( Exception $e ) {
$this->log( $e->getMessage() );
return '';
}
$password = "";
$decoded_pass = base64_decode( $temp_password );
/* no additional checks for servers that aren't configured with mbstring enabled */
if ( ! function_exists( 'mb_detect_encoding' ) ) {
return $decoded_pass;
}
/* end of mbstring check */
if ( base64_encode( $decoded_pass ) === $temp_password ) { //it might be encoded
if ( false === mb_detect_encoding( $decoded_pass ) ) { //could not find character encoding.
$password = $temp_password;
} else {
$password = base64_decode( $temp_password );
}
} else { //not encoded
$password = $temp_password;
}
return stripslashes( $password );
}
function encrypt_password( $pass ) {
if ( $pass === '' ) {
return '';
}
if ( empty( $this->opts[ 'smtp_settings' ][ 'encrypt_pass' ] ) || ! extension_loaded( 'openssl' ) ) {
// no openssl extension loaded - we can't encrypt the password
$password = base64_encode( $pass );
update_option( 'swpsmtp_pass_encrypted', false );
} else {
// let's encrypt password
$cryptor = SWPSMTPUtils::get_instance();
$password = $cryptor->encrypt_password( $pass );
update_option( 'swpsmtp_pass_encrypted', true );
}
return $password;
}
function credentials_configured() {
$credentials_configured = true;
if ( ! isset( $this->opts[ 'from_email_field' ] ) || empty( $this->opts[ 'from_email_field' ] ) ) {
$credentials_configured = false;
}
if ( ! isset( $this->opts[ 'from_name_field' ] ) || empty( $this->opts[ 'from_name_field' ] ) ) {
$credentials_configured = false;
}
return $credentials_configured;
}
function activate() {
$swpsmtp_options_default = array(
'from_email_field' => '',
'from_name_field' => '',
'force_from_name_replace' => 0,
'smtp_settings' => array(
'host' => 'smtp.example.com',
'type_encryption' => 'none',
'port' => 25,
'autentication' => 'yes',
'username' => '',
'password' => ''
)
);
/* install the default plugin options if needed */
if ( empty( $this->opts ) ) {
$this->opts = $swpsmtp_options_default;
}
$this->opts = array_merge( $swpsmtp_options_default, $this->opts );
update_option( 'swpsmtp_options', $this->opts, 'yes' );
//add current domain to allowed domains list
if ( ! isset( $this->opts[ 'allowed_domains' ] ) ) {
$domain = parse_url( get_site_url(), PHP_URL_HOST );
if ( $domain ) {
$this->opts[ 'allowed_domains' ] = base64_encode( $domain );
update_option( 'swpsmtp_options', $this->opts );
}
} else { // let's check if existing value should be base64 encoded
if ( ! empty( $this->opts[ 'allowed_domains' ] ) ) {
if ( SWPSMTPUtils::base64_decode_maybe( $this->opts[ 'allowed_domains' ] ) === $this->opts[ 'allowed_domains' ] ) {
$this->opts[ 'allowed_domains' ] = base64_encode( $this->opts[ 'allowed_domains' ] );
update_option( 'swpsmtp_options', $this->opts );
}
}
}
// Encrypt password if needed
if ( ! get_option( 'swpsmtp_pass_encrypted' ) ) {
if ( extension_loaded( 'openssl' ) ) {
if ( $this->opts[ 'smtp_settings' ][ 'password' ] !== '' ) {
$this->opts[ 'smtp_settings' ][ 'password' ] = $this->encrypt_password( $this->get_password() );
update_option( 'swpsmtp_options', $this->opts );
}
}
}
}
function self_destruct_handler() {
$err_msg = __( 'Please refresh the page and try again.', 'easy-wp-smtp' );
$trans = get_transient( 'easy_wp_smtp_sd_code' );
if ( empty( $trans ) ) {
echo $err_msg;
exit;
}
$sd_code = filter_input( INPUT_POST, 'sd_code', FILTER_SANITIZE_STRING );
if ( $trans !== $sd_code ) {
echo $err_msg;
exit;
}
delete_site_option( 'swpsmtp_options' );
delete_option( 'swpsmtp_options' );
delete_site_option( 'smtp_test_mail' );
delete_option( 'smtp_test_mail' );
delete_site_option( 'swpsmtp_pass_encrypted' );
delete_option( 'swpsmtp_pass_encrypted' );
delete_option( 'swpsmtp_enc_key' );
echo 1;
deactivate_plugins( __FILE__ );
exit;
}
}
EasyWPSMTP::get_instance();
function swpsmtp_uninstall() {
// Don't delete plugin options. It is better to retain the options so if someone accidentally deactivates, the configuration is not lost.
//delete_site_option('swpsmtp_options');
//delete_option('swpsmtp_options');
}
class swpsmtp_gag_mailer extends stdClass {
public function Send() {
return true;
}
}